[1] Leiden Univ Med Ctr, Rheumatol, Leiden, Netherlands
[2] Leiden Univ Med Ctr, Radiol, Leiden, Netherlands
[3] Leiden Univ Med Ctr, Clin Epidemiol, Leiden, Netherlands
[4] Haga Hosp, Rheumatol, The Hague, Netherlands
[5] Reade, Radiol, Amsterdam, Netherlands
[6] Sint Franciscus Vlietland Grp, Rheumatol, Rotterdam, Netherlands